This map is Plate 1 from Andreasen, D.C., “The Geohydrology and Water—Supply Potential of the Lower Patapsco Aquifer and Patuxent Aquifers in the Indian Head-Bryans Road Area, Charles, County, Maryland.” Baltimore: Maryland ...

This map is Plate 1 from Andreasen, D.C., and Smith, B.S., “Hydrogeology and Simulation of Ground-water Flow in the Upper Wicomico River and Estimation of Contributing Areas of the Salisbury Well Fields, Wicomico County, ...

This map is Plate 2 from Crowley, W.P., “The Geology of the Crystalline Rocks Near Baltimore and its Bearing on the Evolution of the Eastern Maryland Piedmont”. Baltimore: Maryland Geological Survey, 1976 (Report of ...